JPS637095Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention was devised to make the connection structure between the chair, that is, the seat plate and the side support legs simple and strong. The plate 1 has a seat plate 2 made of steel plate on the lower surface, and the bottom plate 2
The support beam 3 for connection with the column 5 is fixed by welding or other means, and the support beam has a side opening 4 shaped like an inverted trapezoid, as shown in FIG. The connecting fittings 8 for connecting to the pillars 5 are fixed and fixed using screws 9. On the other hand, the supporting legs 5 have leg bodies 5', 5' each having an outer plate 6 projecting inward at the upper end. It is constructed by joining and connecting the face plates 6, 6, and in the trapezoidal upper space formed by connecting the legs 5', 5', there is a side edge 7 as shown in FIG. ' can be brought into close contact with the inner surface of both legs 5', and the rear plate 7'' is attached to the outer plate 6,
A fixing metal fitting 7 which is brought into close contact with 6 and welded and fixed at a predetermined position of each of these contact parts is fitted into the upper part of the support column 5, that is, between the legs 5', 5', and the lower piece 7b is attached to both ends thereof. It is assumed that the lower surface is fitted and placed on a notched step 5'' provided on the inside of the leg 5 so as to face each other.

Furthermore, the fixing fitting 7 is fitted between the extension pieces 7a' and 7b' which are extended and bent on the upper and lower parts of the fixing fitting 7.
As shown in FIG. 2, the connecting fitting 8 connected to the supporting beam 3 is formed into an inverted trapezoidal shape in side view by bending the plate. A connection port and a fixing nut 10 are provided for the purpose of attaching the extension piece 7 of the upper and lower fixing fittings 7.
It is integrally connected to the fixing fitting by welding the joints with a' and 7b' at appropriate places. In Fig. 3, reference numeral 13 indicates a backrest support rod that is fitted and fixed by welding to both side edges of the seat bottom plate, and the backrest 12 is attached to the rear upwardly bent portion of the backrest support rod 13 using a conventionally known structure. Furthermore, reference numeral 11 indicates a synthetic resin leg cover that covers the outer side of the upper end surface of the supporting leg 5, and an opening provided in the leg cover 11 and the outer surface plate 6 of the supporting leg 5, as well as an opening 14 provided in the rear wall of the fixing bracket 7. are openings for connecting fittings used when connecting a plurality of chairs in parallel, and other openings 15 formed above each of these openings are openings for attaching armrest rods 16 with bolts and nuts 17. .

According to the present invention as described above, the support beam 3 attached to the lower surface of the bottom plate of the seat plate and the support leg 5 formed by welding and connecting the outer plates 6 of the front and rear legs 5' are connected at the upper end of the support beam 3. The inner end of the connecting fitting 8 is inserted into the side opening 4 of the support beam 3 using a fixing fitting 7 that is fitted and welded to the fixing fitting 7 and a connecting fitting 8 that is fitted and welded into the fixing fitting 7. The seat plate and the supporting legs can be easily and reliably connected by fitting together and tightening and connecting the fitting portions using the screws 9. Moreover, the opening 4 of the support beam 3 and the connecting fitting 8 Since the connecting fitting 8 is configured to have an inverted trapezoidal shape when viewed from the side, the inner end of the connecting fitting 8 can be fitted into the opening 4 by fixing it with the lower screw 9 among the fixing screws 9. In the fitted state, they are pulled downward, so that both side walls 8a of the connecting fitting 8 are surface-connected to the inclined side walls 3' of the support beam 3, and the surface connections between the side walls 3' and the side walls 8a are tapered to each other. Due to the current situation, the interview will be held in a competitive or hand-to-hand manner.
In addition to increasing the bonding strength, both side walls 3' and 8a
Even if there is some manufacturing error, this can be absorbed by the surface contact between the tapered surfaces.
Since no clearance is created after that, there is no risk of rattling or loosening. On the other hand, the connection between the connecting fitting 8 and the fixing fitting 7 is achieved by fitting the upper piece 8' and the bottom plate 8'' of the connecting fitting 8 between the inwardly extending pieces 7a' and 7b' of the fixing fitting 7 as shown in the figure. Since they are welded and fixed at the close contact parts, they are as strong as if they were one piece.Furthermore, the connection between the fixing bracket 7 and the supporting leg 5 is such that the rear wall of the fixing bracket 7 is connected to the both legs 5 that make up the supporting leg. It is welded and fixed in close contact with the outer surface plate 6 of the fixture, and both ends of the lower part of the fixture are fitted and locked into the notch steps 5'' formed in both legs 5', and the side edges 7' are fixed to both legs 5' by welding. Since the fixing fitting 7 has a tapered edge inclined in the direction of the upper part so as to be able to come into close contact with the inner surface of the upper end of the leg 5', the fixing fitting 7 can be displaced into the trapezoidal space formed between the legs 5'. Since they are fitted while preventing rattling and are welded under this condition, not only is the connection strength high, but it is also possible to reliably maintain the temporarily fixed state before welding. On the other hand, the support leg 5 has two legs 5' having an upper end outer plate 6.
Since each leg 5' is formed by connecting adjacent edges of the rod by welding or the like, each leg 5' can be easily manufactured by simply extending and bending the outer plate at the upper end of the rod. In the case of a supporting leg structure in which the outer plates 6, 6 are connected in advance, the legs 5', 5' and the outer plate 6 can be manufactured as a continuous unit by bending a single steel plate. It has the disadvantage that it is extremely complex in design and manufacture, and requires high dimensional accuracy.

In this way, in the proposed chair, the support beam 3
Furthermore, each constituent member of the supporting leg 5, the fixing fitting 7, and the connecting fitting 8 and their related structures have useful functions and effects.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a chair showing an embodiment of the present invention. FIG. 2 is an exploded perspective view showing the main parts. FIG. 3 is a longitudinal sectional front view of the connected state showing the main parts. A: Chair, 1: Seat plate, 2: Seat bottom plate, 3: Support beam, 4: Opening, 5: Support leg, 5': Leg body, 6:
External plate, 7: Fixing metal fittings, 8: Connecting metal fittings, 9: Screws, 10: Fixing nuts, 11: Leg cover, 12:
Backrest, 13: Backrest support rod, 14, 15:
Opening, 16: armrest rod, 17: bolt/nut.

Claims (1)

[Scope of Claim for Utility Model Registration] A supporting leg constructed by connecting a pair of front and rear legs with external plates protruding inward at their upper ends and connecting the external plates to each other, and a supporting leg provided on the bottom of the seat plate to form a side opening. a seat plate support beam whose opening is shaped like an inverted trapezoid; a connecting fitting having an inverted trapezoidal portion in side view that fits into the opening of the support beam and is connected with a screw; and a connecting fitting that is integrally connected with the connecting fitting. A chair characterized in that the rear wall can be brought into close contact with the outer surfaces of both leg bodies, the side edges are tapered edges that are brought into close contact with the inner surfaces of both leg bodies, and fixing fittings are welded to the pillars at each close contact part. .